Bake pastry that has been slightly pricked for 5 minutes at 450 in your oven.,Remove.,brush lightly with beaten egg.,______,Bake 5 minutes longer.,Remove to wire rack reduce heat to 350.,In a nonstick skillet saute zuccini and squash until very tender.,Sprinkle with seasonings: spoon into pastry shell.,Top with tomatoes.,Combine cheese and mayonnaise; spread over top.,Bake at 350 for 25 minutes or until golden brown.